抛丸对A5083铝合金焊接接头残余应力的影响
金文涛1，陈菲1，火巧英1，戴忠晨1，孟宪伟1，朱其猛2
（1.中车南京浦镇车辆有限公司，江苏 南京 266111；2.西南交通大学 材料科学与工程学院，四川 成都 610031）
摘要：对A5083铝合金焊接接头进行抛丸处理，测试抛丸前后焊接接头的表面残余应力以及沿深度方向的残余应力。研究结果表明，经抛丸处理后，接头的应力平均值均呈下降趋势，抛丸前应力平均值绝大多数为正数，表示接头应力为拉应力状态，抛丸后接头应力为负数，表示接头应力变为压应力状态，残余应力处于压应力状态有利于抑制裂纹萌生，改善结构的疲劳性能。抛丸对铝合金焊接接头残余应力的影响在600 µm左右，抛丸对焊接接头的改善应力大小为180 MPa左右。
关键词：A5083铝合金；焊接接头；抛丸处理；残余应力
中图分类号：TG406 文献标志码：A doi：10.3969/j.issn.1006-0316.2016.07.004
文章编号：1006－0316 (2016) 07－0013－03
Effect of Ball Throwing on Residual Stress of Welded Joints of A5083 Aluminum Alloys
JIN Wentao1，CHEN Fei1，HUO Qiaoying1，DAI Zhongchen1，MENG Xianwei1，ZHU Qimeng2
( 1.CSR Nanjing Puzhen Co., Ltd., Nanjing 266111, China; 2.Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, China )
Abstract：Ball throwing treat was employed to welded joints of A5083 aluminum alloys. The residual stress of welded joints samples before and after ball throwing treat was tested. Test result showed that the mean residual stress decreased finally. The mean residual stress are almost composed of positive numbers which manifested it was in the tension condition before ball throwing. The mean residual stress are almost composed of negative numbers which manifested it was in the compression condition after ball throwing. The compression condition of residual stress of the welded joints can inhibit the propagation cracks and enhance the fatigue properties. The influenced depth of ball throwing was 600um and the influenced value was about 180 MPa.
Key words：A5083 aluminum alloys；welded joints；ball throwing；residual stress
———————————————
收稿日期：2015－12－21
基金项目：铝合金车体残余应力测试服役安全可靠性行为研究（KJ14－119 C026）
作者简介：金文涛（1986－），男，甘肃崇信人，本科，工程师，主要从事车体组焊工艺工作。
设为首页 | 加入收藏 | 免责条款
《机械》杂志版权所有 Copyright©2008-2012 Jixiezazhi.com All Rights Reserved
电话：028-85925070 传真：028-85925073 E-mail：jixie@vip.163.com
地址：四川省成都锦江工业开发区墨香路48号 邮编：610063
Powered by PageAdmin CMS